<template>
	<div class="list" ref="wrapper">
		<div>
			<div class="area">
				<div class="title border-topbottom">当前城市</div>
				<div class="button-list">
					<div class="button-wrapper">
					<div class="button">{{this.currentCity}}</div>
					</div>
				</div>
			</div>
			<div class="area">
				<div class="title border-topbottom">热门城市</div>
					<div class="button-list">
						<div class="button-wrapper"
						 v-for="item of hot"
						 :key="item.id"
						 @click="handleCityClick(item.name)"
						 >
						<div class="button">{{item.name}}</div>
						</div>
						
					</div>
			</div>
			<div class="area"
			 v-for="(item,key)  of cities"
			 :key="key"
			 :ref="key"
			 >
				<div class="title  border-topbottom">{{key}}</div>
				<div class="item-list">
					<div class="item border-bottom"
					v-for="innerItem of item"
					:key="innerItem.id"
					 @click="handleCityClick(innerItem.name)"
					>
						{{innerItem.name}}
					</div>
				</div>
			</div>
		</div>
	</div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState,mapMutations} from 'vuex'
export default{
	name:'CityList',
	props:{
		hot:Array,
		cities:Object,
		letter:String
	},
	computed:{
		...mapState({
			currentCity:'city'
		})
	},
	methods: {
		handleCityClick(city){
			this.changeCity(city)
			this.$router.push('/')
		},
		...mapMutations(['changeCity'])
	},
	mounted(){
		this.scroll=new Bscroll(this.$refs.wrapper)
	},
	watch:{
		letter (){//监听右边导航栏的变化，并滚动
			if(this.letter){//数据letter不为空
				const element=this.$refs[this.letter][0]//加这个[0]让这个数组变成dom元素
				this.scroll.scrollToElement(element)
			}
			
		}
	}
} 
</script>

<style lang="stylus" scoped>
	@import '~styles/varibles.styl'
	.border-topbottom
		&:before
			border-color:#ccc
		&:after
			border-color:#ccc
	.border-bottom
		&:before
			border-color:#ccc
	.list
		position:absolute
		top:1.58rem
		left:0
		right:0
		bottom:0
		overflow:hidden
		
		.title
			line-height:.44rem
			background:#eee
			padding-left:.2rem
			color:#666
			font-size:.26rem
		.button-list
			padding:.1rem .6rem .1rem .1rem 
			overflow:hidden
			.button-wrapper
				float:left
				width:33.3%
				.button
					margin:.1rem
					text-align:center
					border:.02rem solid #CCC
					padding:.1rem 0
					border-radius:0.6rem
		.item-list
			.item
				line-height:.76rem
				color:#666
				padding-left:.2rem
			
		
		
		
</style>
